D-Link DFL-2500 User Guide - Page 278

23.4. Scenarios: Setting up Traffic Shaping 259 Example: Using chains to create differentiated limits More than one pipe can be connected into a pipe chain to make bandwidth limits more restrict. In the previous example-Applying precedence on pipe limits, a 500kbps limit on precedence "Medium" is defined on pipe "std-in". The "HTTP" rule says that HTTP response from the Internet can use up to 500kbps as higher priority traffic, and the traffic exceeding this limit will fall into priority "Low" specified by the standard rule "FromInternet". Such traffic will compete the remaining 500kbps with all the other traffics(The total limits defined for "std-in" is 1000kbps). If we want to guarantee that other traffics always have at least 500kbps without competing with the exceeded HTTP traffic, we can add an additional pipe "http-in" that limits the total bandwidth consumption to 500kbps, and revise the pipe rule "HTTP" to have a pipe chain on the return direction. In this chain, "http-in" is put in front on "std-in". Traffic belongs to HTTP will need to pass the total limits in "http-in" first before it can go into "std-in". Exceeded HTTP traffic will be queued on "http-in". WebUI : 1. Adding one more pipe "http-in" with total limits 500kbps Enter the following and then click OK. Traffic Shaping → Pipes → Add → Pipe: General Name: http-in Pipe Limits Total: 500 2. Revising pipe rule "HTTP" to create a return pipe chain Traffic Shaping → Pipe Rules → HTTP → Traffic Shaping: Pipe Chains Return Chain: Select "http-in" from Available list and put it into Selected list on TOP of "std-in" and then click OK. D-Link Firewalls User's Guide